Author(s): Buddha Kumar

Abstract: The event of corroding on strong concrete structures can lead to significant scheme losings. Therefore, steel bars used in the real constitution must be situated with a different material that can hold up water contact without exploit corroding and container secure the safe work of the constitution during its lifespan, even in adverse atmospheric condition. Carbon-fibre-reinforced polymer (CFRP) gymnastic apparatus are one of the real that can replace steel bars and they have already been applied as a ersatz previously. This learning analyses the bonding of these bars with concrete at high physical property and for longer time playing period. It presents an enquiry plan that come to a series of disengagement trials at different ages, days, and thermal opportunité in CFRP rods either fumed with ribbed steel bars or that underwent sand-ribbed surface treatment. Some compression tests for each mixture were performed at the same ages and temperatures as the experimental plan in pullout to determine the determiner of high temperatures on tangible. The work realised with some additive tests on the CFRP rods using optical research, scanning electron research (SEM), and thermonuclear force research (AFM), from the evaluated pullout sample distribution. The high physical property significantly subject the ribbed CFRP bars by decreasing their attraction stress and did not affect the sanded CFRP bars. This uneven behaviour and the influence of high somatesthesia on concrete electrical resistance at the age of 180 d is justified. The effect of bonding agents on strength loss of successive casting of self-compacting concrete (SCC) is the subject of the second paper, authored by Assaad and Daou (2021) from Lebanon. SCC slabs were cast in two layers. The instance interval betwixt the two layers was either 60 or 120 min and different bonding agents were used. The polymer-based bonding agent was earnings to bring forth a better bond between the two slab vocal. In addition, the writer present the drop in bond military strength as a series of charts to aid execute engineers when there is interruption in casting of SCC.

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